PDF malware analysis — malicious · 0fa547e61dd6cb4e

MALICIOUS

PDF

72.6 KB Created: 2021-09-02 22:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 2bdcd7039898da3ec716a48d2bb9bfab SHA-1: 3d9b3624f7377616b4d296480dbf04b93641fe26 SHA-256: 0fa547e61dd6cb4ec12adab08276ca76bf6ed9ade105fa6864ed875032cc1c84

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, with numerous embedded URLs pointing to compromised websites, likely serving as a distribution point for phishing or malware. The presence of multiple links on potentially compromised CMS upload directories suggests an attempt to obscure the true destination and evade detection.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://3wsystems.com/shipinc/userfiles/files/80035621907.pdf In PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/t8kt2bcik3hl2jrlo1j5ivtsp5/239731263.pdfIn PDF document text
- https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/79459705560.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/64c5ca6866afa461c242e245475dd5e7/39569631429.pdfIn PDF document text
- https://gencshoworganizasyon.com/upload/ckfinder/files/62638196957.pdfIn PDF document text
- http://jtour.vn/userfiles/file/39850772703.pdfIn PDF document text
- https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/015dd8902e42b2cd53a8992b13ffa365/6126464837.pdfIn PDF document text
- http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/wowub.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/3be00005c8f4b436ca996e790d89f494/mopet.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/a65f5f44ea11c63686c9423c26c55139/68791518377.pdfIn PDF document text
- http://toyteepee.com/uploadfiles/file/210804041521227787gxj9b1.pdfIn PDF document text
- http://skidubravy.sk/spravca/ckfinder/userfiles/files/mupazej.pdfIn PDF document text
- http://vasvaripalmuzeum.hu/upload/file/36472773346.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f10e83d231c---wixogevim.pdfIn PDF document text
- http://myexamadvisor.com/fck_uploads/files/laziridesa.pdfIn PDF document text
- https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/84c463f8467bbedc669d017547ef6c22/63437560855.pdfIn PDF document text
- http://trhs64.com/clients/c/cf/cfad56e582d93fa9eda51f2516e23bdb/File/35978188861.pdfIn PDF document text
- https://hoalavender.net/upload/files/zujixomovumoretopeveraw.pdfIn PDF document text
- http://tjjjsh.com/uploads/files/26989223929.pdfIn PDF document text
- https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/jvl4ed5b1gvouce5nskkvecpg9/wobigizefafigosukorenozot.pdfIn PDF document text
- https://thediamangroup.com/_images/files/82158040980.pdfIn PDF document text
- https://study4student.com/cache/fck_files/file/robakedazulotipo.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/87117509256.pdfIn PDF document text
- http://luberoff.com/userfiles/file/buxelefaw.pdfIn PDF document text
- http://houstontca.org/Content/uploads/files/vutekuweketetefax.pdfIn PDF document text
- https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/7d834e3951e083aa849826d24924273b/6714130180.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=tenancy+agreement+template+pdf+ukPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000bda5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBDA5	10852 bytes
SHA-256: `e13c0cd8b3a11533cc21a0f850b0de048ba08eb463e8725059f18d9d29aa6ee4`
`font_01_sfnt_off0000d68f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD68F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000eea1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEA1	15216 bytes
SHA-256: `f98412f6fbc3611c052540a342a8f7de362198bc30aece6eed3c7940fc088943`

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